U.S. patent application number 12/308992 was filed with the patent office on 2010-06-03 for compression or support stocking.
Invention is credited to Erik Berndt, Antje Virkus.
Application Number | 20100137776 12/308992 |
Document ID | / |
Family ID | 38170048 |
Filed Date | 2010-06-03 |
United States Patent
Application |
20100137776 |
Kind Code |
A1 |
Virkus; Antje ; et
al. |
June 3, 2010 |
Compression or support stocking
Abstract
The invention relates to a compression or support stocking to
encase a human leg, comprising a first understocking and a first
overstocking, each with a leg section and a foot section, which can
be worn over each other, wherein the understocking has a continuous
pressure progression in the area between measuring points B and B1,
and the pressure at measuring point 1 amounts to 90%-100% of the
pressure at measuring point B. The invention further relates to the
use of a compression or support stocking for treating Ulcus cruris
venosum.
Inventors: |
Virkus; Antje; (Strasbourg,
FR) ; Berndt; Erik; (Herbrechtingen, DE) |
Correspondence
Address: |
DREISS, FUHLENDORF, STEIMLE & BECKER
POSTFACH 10 37 62
D-70032 STUTTGART
DE
|
Family ID: |
38170048 |
Appl. No.: |
12/308992 |
Filed: |
April 14, 2007 |
PCT Filed: |
April 14, 2007 |
PCT NO: |
PCT/EP2007/003314 |
371 Date: |
November 10, 2009 |
Current U.S.
Class: |
602/62 ;
602/76 |
Current CPC
Class: |
A61F 13/08 20130101 |
Class at
Publication: |
602/62 ;
602/76 |
International
Class: |
A61F 13/06 20060101
A61F013/06; A61L 15/00 20060101 A61L015/00 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 7, 2006 |
DE |
10 2006 032 223.1 |
Claims
1-16. (canceled)
17. A compression or support stocking to encase a human leg, the
stocking comprising: a first understocking having an understocking
leg section and an understocking foot section; and a first
overstocking having an overstocking leg section and an overstocking
foot section, wherein said overstocking and said understocking are
structured and dimensioned to be worn over each other, said
understocking having a continuous pressure progression in an area
between a first measuring point and a second measuring point,
wherein a pressure at said first measuring point amounts to
90%-100% of a pressure at said second measuring point.
18. The compression or support stocking of claim 17, wherein said
understocking and said overstocking are knit or circular knit
fabric.
19. The compression or support stocking of claim 17, wherein said
pressure at said first measuring point of said understocking
corresponds to between 93% and 100%, between 95% and 100%, or
between 97% and 100% of said pressure at said second measuring
point.
20. The compression or support stocking of claim 17, wherein said
overstocking has a continuously degressive or gradually degressive
pressure progression starting from said second measuring point and
progressing towards a hip of the human leg.
21. The compression or support stocking of claim 17, wherein said
overstocking is a compression stocking with a pressure progression
in accordance with RAL-GZ 387.
22. The compression or support stocking of claim 17, wherein said
understocking has a continuously degressive or gradually degressive
pressure progression in an area proximal said first measuring
point.
23. The compression or support stocking of claim 17, wherein a
joint compression pressure of said overstocking and said
understocking is 5-15 mm Hg higher than a compression pressure of
an individual stockings.
24. The compression or support stocking of claim 17, wherein said
understocking has an integrally formed foot section with a
coefficient of friction of .mu..sub.D.ltoreq.0.65.
25. The compression or support stocking of claim 17, wherein said
leg section of said understocking and/or of said overstocking has a
pattern or a pattern having waves running in a circumferential
direction.
26. The compression or support stocking of claim 25, wherein
patterns of said understocking and said overstocking are congruent
when said stockings are worn over each other.
27. The compression or support stocking of claim 17, wherein said
understocking has a marking for positioning of said
overstocking.
28. The compression or support stocking of claim 27, wherein said
marking consists of a change of color, texture or pattern in said
understocking.
29. The compression or support stocking of claim 17, wherein said
foot section of said understocking has an integrally formed heel
section developed through thermal treatment.
30. The compression or support stocking of claim 17, wherein said
understocking and/or said overstocking comprises thread or
comprises threads in said leg sections, wherein an elastic core
thread is enwound with a cotton fiber containing yarn or a staple
fiber yarn.
31. The compression or support stocking of claim 30, wherein said
cotton fiber containing yarn contains 70%-90% cotton and 10-13%
algae containing fibers.
32. Use of the compression or support stocking of claim 17 for
treating Ulcus cruris venosum by placing a wound dressing on a skin
lesion, with the wound dressing being covered by said understocking
and said overstocking being worn at least temporarily, or at
daytime, over said understocking.
33. A compression or support stocking to encase a human leg, the
stocking comprising: a first understocking having an understocking
foot section covering a foot region of the leg and an understocking
leg section adjacent to said understocking foot section and
extending upward from the foot region of the leg to cover a lower
leg region of the leg; and a first overstocking having an
overstocking foot section covering said understocking foot region
and an overstocking leg section covering said understocking leg
section, said understocking having a continuous pressure
progression in an area between a first measuring point and a second
measuring point, wherein a pressure at said first measuring point
amounts to 90%-100% of a pressure at said second measuring point.
Description
[0001] The invention concerns a compression or support stocking to
encase a human leg, comprising a first understocking and a first
overstocking, each with a leg section, which can be worn over each
other, wherein the overstocking is permanently or only temporarily
worn over the understocking.
[0002] Compression and support stockings are used in medical
compression therapy and also in the non-therapeutic cosmetic area
as support stockings to apply resting and also working pressure to
a human leg. Resting pressure in this context refers to the
pressure that the stocking as such applies to the resting leg,
whereas working pressure is the pressure that is exerted on the leg
through muscle contraction and by the stocking while the leg is
being moved.
[0003] In this context, it is also common, in addition to pure
compression therapy for treating a number of venous diseases, to
treat illnesses where compression pressure is to be applied in
addition to wound dressing. For this purpose, a wound dressing is
first applied to a wound and a compression stocking is then pulled
over it.
[0004] A method for treatment of such diseases is known, for
example, from U.S. Pat. No. 5,005,567, where an easily applicable
loosely-knit sock is first pulled over the wound dressing material
and then an elastic sock with a low coefficient of friction is
pulled over the first understocking between stockings, with the
application of the second stocking being facilitated due to the low
friction between the stockings.
[0005] The above-mentioned method envisions that the understocking
has no compressive effect whatsoever. The overstocking can have a
compression ranging from 10 through 50 mm mercury in the ankle
area.
[0006] The disadvantage of that system is that the overstocking
must have high compression power as all compression is to be
achieved by the overstocking. Furthermore, there is the danger of
wrinkling in the area of the understocking as the understocking is
loosely applied.
[0007] In addition, DE 42 16 650 A1 provides a cosmetic support
stocking for treating cosmetically relevant orange-peel skin and
improving the physiological muscular pump, consisting of several
compression stockings or compression pantyhose or bandages that are
to be worn over each other. Furthermore, the individual parts can
be firmly or flexibly joined with each other to secure their
positions relative to each other.
[0008] Each individual stocking has only a low compressive effect
and can thus be easily and quickly applied. Pulling several
stockings over each other, however, considerably increases the
pressure exerted on the skin, so that a sufficient compression
pressure is eventually achieved.
[0009] Finally, a multilayer compression stocking system is known
from WO 01/00118 A1, which envisions markings for the positioning
of the stockings relative to each other to ensure that the
compression pressure is distributed correctly on a leg.
[0010] Furthermore, a number of monolayer compression stockings are
known.
[0011] Norm RAL-GZ 387 of September 2000 governs the measuring and
quality assurance of medical compression stockings. The testing
provisions of the norm describe how the pressure of a compression
stocking on a leg is to be determined.
[0012] The invention is based on the task of providing a generic
compression or support stocking to encase a human leg which can be
used favorably to treat chronic venous insufficiency as well as its
signs, symptoms and complications such as, for example, Ulcus
cruris venosum, while ensuring easy application.
[0013] The invention fulfills this task by means of a compression
or support stocking according to the elements recited in claim 1,
wherein the understocking has a continuous pressure progression in
the area between measuring points B and B1, and the pressure at
measuring point B1 amounts to 90% to 100% of the pressure at
measuring point B.
[0014] Measuring points B and B1 are points relating to the ankle
area of a human leg and enclosing that area between them. The
measuring points are determined in accordance with the pertinent
provision RAL-GZ 387. In the context of the present invention,
continuous pressure progression between measuring points B and B1
means a pressure progression whose interpolated single values at
every point between points B and B1 deviate from the value measured
at B by a maximum of 10%, in particular by a maximum of 7% and very
particularly by a maximum of 5%. A continuous pressure progression
between other measuring points must correspond to the present
provision accordingly.
[0015] In this context, measuring point B corresponds to a point on
the human lower leg located immediately above the ankle at the
point where the lower leg has the lowest circumference. Measuring
point B1 corresponds to a point on the human lower leg located at
the given distance above measuring point B, i.e. proximally at the
transition from the Achilles tendon to the calf. Other points under
the RAL Norm (RAL-GZ 387) are, for example, point C, i.e. the
highest circumference of the calf, and point D, which is located
two fingers below the hollow of the knee.
[0016] The invention envisions that the pressure at measuring point
B1 in the understocking amounts to between 90% and 100% of the
pressure at measuring point B. Preferably, the pressure at
measuring point B is equal to the pressure at measuring point B1.
The invention envisions that the area between measuring points B
and B1 is a therapeutic area in particular for treating
complications of chronic venous insufficiency such as, for example,
Ulcus cruris venosum, which is known as "gaiter leg ulcer" in its
most severe form, where the patient has open lesions of the skin in
the ankle area. These lesions are then covered with wound dressings
for treatment, which are subsequently covered by the understocking.
Providing an essentially continuous pressure progression with a
maximum deviation of 10% in the ankle area ensures that a constant
pressure is built up across the entire area to be treated, so that
the skin surface to be treated is not weighted with different
pressures.
[0017] The present invention therefore also concerns use of a
compression or support stocking to encase a human leg, comprising a
first understocking and a first overstocking, each with a leg
section and a foot section, which can be worn over each other,
wherein the understocking has a continuous pressure progression in
the area between measuring points B and B1, and the pressure at
measuring point B1 amounts to 90%-100% of the pressure at measuring
point B, to produce a preparation for treating chronic venous
insufficiency as well as its signs, symptoms and complications, in
particular healed or florid Ulcus cruris venosum,
dermatoliposclerosis and/or atrophie blanche.
[0018] According to Widmer, chronic venous insufficiency can, in
principle, be classified into three stages. Based on this system,
chronic venous insufficiency is classified as follows: Grade I of
chronic venous insufficiency is characterized by starburst-like
veins (Corona phlebectatica) located around the ankle and above the
vault of the foot and by ankle edema.
[0019] Grade II manifests itself in hyperpigmentation of the skin,
lower leg edema and dermatoliposclerosis. The skin is firmly
interwoven with the crural fascia, cannot be lifted in creases and
is excessively shiny. An extreme variation of dermatoliposclerosis
is atrophie blanche (also referred to as Capillaritis alba), which
occurs almost exclusively as a complication of chronic venous
insufficiency and manifests itself by depigmentation in the distal
lower leg as a result of vasculitis of small skin vessels that is
often a painful precursor of Ulcus cruris. This skin change
typically shows white, atrophic, coin- to palm-sized foci. They are
commonly located in the ankle region or in the scarred areas of
healed ulceration.
[0020] Grade III manifests itself as florid or healed Ulcus cruris
venosum. Its predilection site is the perimalleolar region
(Bisgaard's link), but it can also occur at other locations on the
lower leg. Extensive ulcers affecting the entire lower leg in
circular shape are referred to as "gaiter leg ulcer". Another
classification of chronic venous insufficiency that is common today
is the CEAP classification. In this context, see the publication
"Grundlagen der Phlebologie", chapter 4.3 "Chronische Venose
Insuffizienz" (ed. R. Rabe, 3.sup.rd edition, pp. 111-129).
[0021] In particular, the overstocking and/or the understocking of
a compression or support stocking according to the invention may be
provided as knit, preferably circular knit, fabric. In particular,
the stockings are manufactured as so-called AD stockings in
accordance with RAL-GZ 387. The stockings can also be manufactured
according to the specifications (Cahier des charges) described in
the "Referentiel technique des ortheses elastiques de contention
des membres" (Revision No. 05). Such stockings can generally have
an optional toe section and a foot section with a heel, an adjoined
leg section in the area of the lower leg and a stocking with a
stocking top.
[0022] In a preferred embodiment, the pressure of the understocking
at measuring point B1 amounts to between 93% and 100%, in
particular 95% through 100% and in particular 98% through 100% of
the pressure at measuring point B. A pressure progression that is
as continuous as possible improves the wound healing and the
fixation of the wound dressing under the understocking.
Furthermore, one embodiment of the invention envisions that the
overstocking has a continuously degressive or gradually degressive
pressure progression starting from measuring point B and
progressing towards the hip of the human leg, i.e. in proximal
direction. In particular, the overstocking may be a compression
stocking with a pressure progression in accordance with the norm
RAL-GZ 387.
[0023] The RAL Norm (RAL-GZ 387) stipulates different compression
classes, wherein the overstocking can be a stocking with
compression classes 1 through 4 under the norm.
[0024] The understocking can in particular be a stocking whose
pressure progression does not correspond to the RAL Norm, but also
stockings in accordance with the norm can be provided. The
understocking shows a degressive progression taking a continuously
or gradually degressive course or a continuous or constant pressure
progression in the area proximal of measuring point B1. In an
embodiment where the understocking has a continuous pressure
progression in the area proximal of measuring point B1 or proximal
of the area to be treated, this embodiment may in particular
provide merely a lower compression pressure under 8 mm Hg in the
understocking. Wrinkling under the overstocking when putting the
overstocking on must nevertheless be prevented.
[0025] In this context, the invention envisions in particular that
the understocking is responsible for providing the desired resting
and working pressures, while the overstocking also contributes to
this. Therefore, in a particularly favorable embodiment, the
understocking is worn day and night to fix the wound dressing
firmly on the wound to be treated and prevent too frequent removal
of the wound dressing from the wound, which affects the wound
healing process. At the same time, however, this ensures that at
the time of night's rest, during which the legs are normally put
up, the compression effect is only weak, so that numbness sensation
and strangulation in the area of the legs are avoided. In the
course of the day, during which the wearer of the compression
stocking moves around, the overstocking, which provides a stronger
compression effect, can then be pulled over the understocking in
addition without interfering with the wound healing process, so
that during the day, in addition to the existing resting and
working pressures exerted by the understocking, a similar, stronger
resting and working pressure is achieved with the help of the
overstocking, so that the muscular activity results in additional
compression therapy and the underlying disease is positively
influenced. The provision of two stockings placed over each other
enables a lower compression effect for each stocking, which
facilitates the process of putting the stockings on.
[0026] In one embodiment, the joint compression pressure of
overstocking and understocking may be 5 through 15 mm mercury (mm
Hg) higher than the compression pressure of the individual
stockings. The compression pressure is measured by means of a
compression testing device according to the Hohenstein system
(Nosy), a detailed description of which can be read in the
"Hohensteiner Forschungsbericht" of January 1982 and "Phlebol and
Proktol." 11: 34-41 (1982).
[0027] One embodiment envisions that the joint compression at point
B of both stockings is between 34 and 60 mm Hg, preferably between
34 and 50 mm Hg, with one mm Hg equaling 133.322 pascal.
[0028] The understocking has a compression of 15 through 32 mm Hg,
preferably of 15 through 25 mm Hg, at measuring point B. The value
at point B1 amounts to 90% to 100% of the value at point B. Values
from 5% to 80%, preferably between 50% and 80% or 5% to 50%, of the
pressure at point B can occur at a point C, with the pressure drop
occurring between B1 and C.
[0029] The overstocking, which is manufactured in accordance with
the RAL Norm (RAL-GZ 387), has a compression of 15 to 32 mm Hg at
point B.
[0030] An embodiment may provide a working pressure, which is
caused on a leg by wearing a compression or support stocking
according to the invention, which is at least 10 to 35 mm Hg higher
than the resting pressure, with the resting pressure amounting to
at least 34 mm Hg.
[0031] In particular, the compression stockings according to the
invention may be circular knit compression stockings, which are, in
particular, so-called AD stockings, i.e. calf stockings in
accordance with the RAL Norm (RAL-GZ 387). One embodiment envisions
that the compression stockings are manufactured according to the
specifications (Cahier des charges) described in the "Referentiel
technique des ortheses elastiques de contention des membres"
(Revision No. 05).
[0032] Furthermore, to facilitate the application of the
overstocking over the understocking, one embodiment may have a foot
section that is integrally formed at the understocking and has a
dynamic coefficient of friction of .mu..sub.D.ltoreq.0.65, in
particular .mu..sub.D.ltoreq.0.60 and very particularly preferably
.mu..sub.D.ltoreq.0.55, wherein the coefficient of friction is
measured analogous with DIN-EN-ISO 8295: 2004-10. This includes
measuring the material of the integrally formed foot section to be
analyzed against the material that is located at the interior of an
overstocking in a situation where the stocking has been correctly
applied, namely the surface (mating material) which is to be pulled
over the foot section according to the application requirements.
The materials are analyzed in an unstreched condition while
ensuring that all materials lie uncreased, that the materials are
measured along manufacturing direction and that the mating material
is clamped along the manufacturing direction. Otherwise, the
conditions of the norm referenced above apply, wherein in
particular a testing speed of 100 mm/min is to be observed.
[0033] The foot section of the understocking may provide an
integrally knit toe section as well as an integrally formed heel,
with the heel having in particular no stitched seam but being
developed only through thermal deformation of the fabric. The foot
section has preferably no compression, with the very smooth fabric
ensuring easy application of the overstocking in the strongly bent
foot area.
[0034] The overstocking and/or the understocking may have a
so-called reciprocated heel, which corresponds to RAL Norm RAL-GZ
387, wherein the toe area may be open or closed.
[0035] In particular, the understocking and/or the overstocking may
also have a pressure relief area bordering the leg section. If the
stocking or the stockings have been applied correctly, this
pressure relief area is located in the ankle area and between the
leg section and the foot section of the stocking accordingly. This
pressure relief area has the advantage that the transition from
very high pressure to low through very low pressure is not abrupt
in the area bordering the ankle area, in particular at point B,
which shows the highest pressure, and that no constriction thereby
occurs within the area covered by the stocking. In a particularly
preferred embodiment, understocking and/or overstocking has a
reciprocated heel, wherein a pressure relief area is located in the
border area of the reciprocated heel. In particular, this pressure
relief area may be upsilon-shaped (Y-shaped) in a lateral view of
the stocking. In that embodiment, the reciprocated heel is
completely encircled by the pressure relief area. Another
embodiment envisions, however, that the pressure relief area is
located radially at the end of the leg section in the understocking
and/or overstocking.
[0036] Furthermore, another embodiment may be provided with a
pattern, in particular a wave pattern, in the leg section of the
understocking and/or the overstocking, with the waves running in
circumferential direction. This wave pattern may in particular be
knit into the material, so as to form raised and less raised zones.
This pattern can help achieve better fixation of both stockings
over each other, as it increases the roughness and thus the
adhesion of both leg sections. In a particularly preferred
embodiment, the patterns of understocking and overstocking are
congruent when the stockings are worn over each other.
[0037] It is also favorable for the understocking to have a marking
for the positioning of the overstocking. This marking may in
particular consist of the top edge of the understocking.
Furthermore, the marking may consist of a change of color, texture
or pattern in the understocking, with the top edge of the leg
section or the top of the overstocking being pulled up to that
marking.
[0038] In a preferred embodiment, the knit fabric of the stockings
contains at least one elastic insertion thread and at least one
elastic knitting thread to achieve the desired elastic
properties.
[0039] In a particularly preferred embodiment, the understocking
and/or the overstocking is made of threads consisting of an elastic
core thread that is enwound with yarn containing cotton fibers, in
particular a staple fiber yarn, as enwinding thread, at least in
the leg section. A particularly favorable embodiment envisions that
an elastane core, for example a core made of Lycra.RTM., is used as
the core thread, with the core being enwound with a single, double
or multiple layer of thread and the yarn material used to enwind
the core being a multifilament yarn made of polyamide or either a
multifilament yarn made of polyamide or a staple fiber yarn being
used as the enwinding thread.
[0040] It is favorable if the staple fiber yarn is made of 70%
through 90% cotton and 10% through 30% algae containing cellulose
material. The cellulose threads containing algae material may in
particular be Seacell.RTM. fibers (SeaCell GmbH, Rudolstadt,
Germany), wherein the algae materials are incorporated in the
cellulose fibers. The algae are evenly spread within the cellulose
fibers in particle form.
[0041] The algae particles may come from brown algae, namely
preferably Ascophyllum nodosum, or red algae, namely preferably
Lithothamnium calcareum. The fibers can be produced using the
Lyocell method. Using such fibers has the advantage that agents
such as vitamin E (tocopherols), carotenoids and minerals in their
ionic form, such as sodium ions, calcium ions or magnesium ions,
are released in the presence of water and/or perspiration. The
agents are incorporated in the algae containing fibers for longer
periods and do not immediately wash out even during laundering
operations. Seacell.RTM. or other algae containing fibers consist
of at least 90% w/w cellulose, 0.1-10% w/w algae and 0-10% other
additives. When released, the agents contained in the algae have a
positive effect on the wearer's skin. Provided that both the
understocking and the overstocking contain algae material, this
prevents a gradient of agents between the stockings and thus
supports the release of the agents onto the wearer's skin.
[0042] The present invention therefore also concerns the use of a
compression or support stocking to encase a human leg, in
particular comprising a first understocking and a first
overstocking, each with a leg section and a foot section, which can
be worn over each other, wherein in particular the understocking
has a continuous pressure progression in the area between measuring
points B and B1, and the pressure at measuring point B1 amounts to
90%-100% of the pressure at measuring point B, wherein the
stocking, in particular the understocking, comprises staple fibers
comprising algae containing cellulose material to produce a
preparation for treating dermatoliposcierosis or atrophie
blanche.
[0043] Furthermore, the invention concerns the use of a compression
or support stocking according to one of the previous claims for
treating Ulcus cruris venosum by placing a wound dressing on a skin
lesion and covering the wound dressing with the understocking and
wearing the overstocking at least temporarily, preferably at
daytime, over the understocking.
[0044] In accordance with a further aspect, the present invention
also concerns a set consisting of a compression or support stocking
to encase a human leg and a wound dressing, wherein the compression
or support stocking comprises a first understocking with a leg
section and a foot section, wherein the understocking has a
continuous pressure progression in the area between measuring
points B and B1, and the pressure at measuring point B1 amounts to
90%-100% of the pressure at measuring point B. Wound dressings
which have foam material, in particular a polyurethane foam, as a
wound contact layer are particularly preferred. This wound contact
layer may be applied to a carrying layer, which is, in turn,
adhesive. In a preferred embodiment, the compression or support
stocking may additionally comprise a first overstocking with a leg
section and a foot section, which can in particular be worn over
the understocking.
[0045] The invention is explained in more detail below on the basis
of a drawing, wherein:
[0046] FIG. 1 shows a compression stocking according to the
invention,
[0047] FIG. 2 shows a laying pattern of a part of a leg section of
an understocking,
[0048] FIG. 3 shows a laying pattern of another part of a leg
section of the understocking, and
[0049] FIGS. 4 and 5 show the measured pressure curves of a
compression stocking according to the invention.
[0050] FIG. 1 shows the structure of a compression stocking 10
according to the invention. This compression stocking is
manufactured as a knee-high stocking or AD stocking consisting of
an understocking 10a and an overstocking 10b, each with a leg
section 11a, 11b, and each with a foot section 12a, 12b, which can
be applied and worn over each other. To clarify the component parts
of each stocking, FIG. 1 shows the understocking 10a and the
overstocking 10b separately on the same leg 1. When used, these
stockings are put on or worn over each other in such a way that the
top edge of the stocking top 4 of the overstocking corresponds to
the bottom edge of the stocking top 3 of the understocking (shown
by the dotted line in FIG. 1).
[0051] The understocking 10a has a pressure relief area 5 at the
top end of the foot section 12a, bordering the leg section 11a.
This pressure relief area 5 is integrally and seamlessly formed at
the foot section 12a and integrally and seamlessly formed at the
leg section 11a. The foot section 12a of the understocking 10a is
shown with a closed toe 6, with this toe being made of reinforced
material in comparison to the rest of the foot section.
[0052] The overstocking 10b also has a pressure relief area 7. This
relief area 7 completely encloses a reciprocated heel 8 provided
here and is integrally and seamlessly formed at a leg section 11a
and integrally and seamlessly formed at the reciprocated heel 8.
The pressure relief area is V-shaped as shown here or Y-shaped (not
shown) in the lateral view, depending on the size of the heel. The
foot section 12b of overstocking 10b is shown with an open toe,
wherein the foot section has a stocking top 9 at its end.
[0053] Both the understocking 10a and the overstocking 10b are
shown as circular knit fabric, wherein each stocking has a wave
pattern in its respective leg section 11a, 11b. This wave pattern
is enabled by different types of knitting, with two different knits
being used. The wave pattern is designed in a way that the two
knitting types follow each other in turns. The knitting pattern of
the understocking 10a in the leg section 11a is shown in the laying
patterns in FIG. 2 and FIG. 3. FIG. 2 shows the laying pattern of
the areas 20 (FIG. 1). Accordingly, two different knitting threads
21, 22 and an insertion thread 23 are used in these areas. The
understocking has a 1:1 insertion thread and alternating knitting
threads. FIG. 3 illustrates the knit of the areas 30 (see FIG. 1).
Accordingly, the same knitting threads 21, 22 (compared with FIG.
2) and the same insertion thread 23 are used in these areas. In
contrast to the areas 20, however, the insertion thread is used as
a 2:2 insertion thread in the areas 30.
[0054] Both the pressure relief area 5 of the understocking and the
pressure relief area 7 of the overstocking are manufactured using
the same materials as the respective leg sections 11a, 11b of the
two stockings. In these areas, the insertion thread is used as a
3:2 insertion thread.
[0055] The laying patterns of the corresponding areas 40 and 50 in
the overstocking 10b correspond to the laying patterns illustrated
in FIGS. 2 and 3, with the difference being that only one knitting
thread 41 and one insertion thread 42 are used in the entire leg
section 11b of the overstocking (not shown here).
[0056] The following example specifies the materials for
understocking and overstocking. The numbering refers to FIGS. 1, 2
and 3.
[0057] Materials Overstocking 10b:
[0058] Knitting threads stocking top 4:
[0059] a) 44 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0060] i) 44f26/1 dtex PA 6.6 (Tactel.RTM. diabolo)
[0061] b) 78 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0062] i) 26f28/1 dtex PA 6.6 (microfiber yarn)
[0063] Knitting thread 41 in leg 11b, foot 12b and pressure relief
area 7:
[0064] a) 44 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0065] i) 44f26/1 dtex PA 6.6 (Tactel.RTM. diabolo)
[0066] Insertion thread 42 in leg 11b, foot 12b and pressure relief
area 7:
[0067] a) 570 dtex EL Lycra.RTM. (core)--enwound with a double
layer of [0068] i) 44f13/1 dtex PA 6.6 and [0069] ii) staple fiber
yarn Nm170/1
[0070] Knitting thread heel 8 and stocking top 9 (open toe):
[0071] a) 78 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0072] i) 60f68/1 dtex PA 6.6 (microfiber yarn)
[0073] Materials Understocking 10a:
[0074] Knitting thread stocking top 3:
[0075] a) 78 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0076] i) 26f28/1 dtex PA 6.6 (microfiber yarn)
[0077] Knitting thread 21, 22 in leg 11a and pressure relief area
5:
[0078] a) 44 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0079] i) 44f26/1 dtex PA 6.6 (Tactel.RTM. diabolo) [0080] b) 44
dtex EL Lycra.RTM. (core)--enwound with a double layer of [0081] i)
44f34/1 dtex PA 6.6 and [0082] ii) staple fiber yarn Nm170/1
[0083] Insertion thread 24 in leg 11a and pressure relief area
5:
[0084] a) 156 dtex EL Lycra.RTM. (core)--enwound with a double
layer of [0085] i) 44f13/1 dtex PA 6.6 and [0086] ii) staple fiber
yarn Nm170/1
[0087] Knitting thread in foot 12a:
[0088] a) 78f51/1 dtex Tactel.RTM. PA 6.6
[0089] b) 44 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0090] i) 44f26/1 dtex PA 6.6 (Tactel.RTM. diabolo)
[0091] Knitting thread toe 6:
[0092] a) 78 dtex EL Lycra.RTM. (core)--enwound with a double layer
of [0093] i) 26f28/1 dtex PA 6.6 (microfibers)
[0094] EL refers to elastane and Nm to "Nummer metrisch" (metric
number). Furthermore, an elastane core enwound with a double layer
is enwound with a first yarn i) as a first layer and with a second
yarn ii) as a second layer or with the first yarn i) as a second
layer over the first layer, with the threads intersecting. The yarn
supplier for the enwound yarns is the company Zimmermann, Weiler
Simmerberg, Germany. The staple fiber yarn has the following
composition: 75% cotton, 25% Seacell.RTM., Seacell.RTM. contains 8%
through 12% algae incorporated in cellulose. The yarn is supplied
by SeaCell GmbH, Rudolstadt, Germany.
[0095] In addition, FIGS. 4 and 5 below show pressure progression
for the overstocking and the understocking. The measuring of
compression and fitting of the clamps is carried out according to
RAL-GZ 387, wherein the understocking (FIG. 4) has a largely
constant compression pressure in the area between B and B1 after a
slight initial pressure drop. The double dotted lines define the
admissible area according to the RAL Norm (RAL-GZ 387). As can be
seen here, the understocking is not a stocking as defined by the
RAL Norm (RAL-GZ 387), as it leaves the stipulated area between
measuring points C and D. The depiction of the overstocking (FIG.
5), however, shows that this stocking essentially corresponds to
the pressure progression stipulated for a norm stocking under the
RAL Norm (RAL-GZ 387). The compression pressure is measured by
means of a compression testing device using the Hohenstein system
(Nosy), a detailed description of which can be read in the
"Hohensteiner Forschungsbericht" of January 1982 and "Phlebol and
Proktol." 11: 34-41 (1982).
[0096] Other advantages and properties of the invention are
described in the other application documents.
[0097] A compression stocking or support stocking can be provided
in the above-mentioned way, which is very well suited to be used
for treating diseases where open wounds and skin lesions must be
covered by a wound dressing within the compression area.
* * * * *